Arduino UNO使用LCD1602显示文字

可乐丸子

下面介绍使用Arduino UNO和LCD1602液晶屏显示文字的方法，为了减少LCD1602和Arduino UNO的连线，使用I2C连接
LCD1602的VCC GND SDA SCL分别连接Arduino UNO的5V GND A4 A5
首先打开Arduino IDE新建一个sketch，检查LCD1602的I2C地址
#include <Wire.h>void setup(){  Wire.begin();  Serial.begin(115200);  Serial.println("\nI2C Scanner");}void loop(){  byte error, address;  int nDevices;  Serial.println("Scanning...");  nDevices = 0;  for(address = 1; address < 127; address++ )  {    Wire.beginTransmission(address);    error = Wire.endTransmission();    if (error == 0)    {      Serial.print("I2C device found at address 0x");      if (address<16)        Serial.print("0");      Serial.print(address,HEX);      Serial.println("  !");      nDevices++;    }    else if (error==4)    {      Serial.print("Unknow error at address 0x");      if (address<16)        Serial.print("0");      Serial.println(address,HEX);    }      }  if (nDevices == 0)    Serial.println("No I2C devices found\n");  else    Serial.println("done\n");  delay(5000);}上传后打开Arduino IDE的工具菜单--串口监视器，查看LCD1602的I2C地址，笔者这里为3F
然后新建一个sketch，输入下面代码用于在LCD1602液晶屏显示两行文字Arduino UNO和www.eeboard.com
#include <wire.h>#include <liquidcrystal_i2c.h>LiquidCrystal_I2C lcd(0x3F,16,2);void setup()  {    lcd.init();  lcd.backlight();}  void loop()  {  lcd.setCursor(0,0);  lcd.print("Arduino UNO");  lcd.setCursor(0,1);    lcd.print("<a href="https://www.eeboard.com" )"="">www.eeboard.com")</a>;    delay(1000);  }</liquidcrystal_i2c.h></wire.h>
上传显示效果如下